The man is seen wearing light-coloured clothing and a hat, BBC reported.Meanwhile, the Belgian Crisis Centre said the death toll in the bombings of March 22 at Zaventem Airport and the metro station has risen to 35, after four people succumbed to injuries in the hospital.

Separately, three men were charged with belonging to a terrorist group.The three men - Yassine A, Mohamed B and Aboubaker O - were arrested during raids on 13 addresses on Sunday.

A fourth man was released without charge.More arrests have also taken place in relation to what authorities say were planned attacks on France.A man already in Belgian custody was reported to have been charged in connection with a foiled attack in the Paris region.

Dutch police announced yesterday evening that they had detained a Frenchman, 32, in Rotterdam at the request of French authorities. He was arrested on suspicion of organising an attack in France and will be extradited to the country. Three other people were also detained.